Double windowpane



May 9, 1944 c. F. HUDDLE 2,348,297

DOUBLE wINDow PANE Filed new.v 9, 1942 Patented May 9, 1944 .l'fMtor Y, Parallelle Applicatiun December Claims.

This invention relates to a multiple window pane structure having a heat insulating space for air or some other medium between the panes.

It relates more speciiically to such structures in which the panes are sealed in a frame of metal or the like by some kind of adhesive cement. Such a cement should be strongly adhesive to the materials of the multiple window pane. should have'some resilience, be capable of expansion and contraction without destruction of the seal, and should not permit permeation of moisture from the atmosphere into the space between the panes with consequent fogging of the inside surfaces of the panes. K

Diterent kinds of thermoplastic sealing compound have been used but no one of them has all the desirable qualities enumerated above and none is known to the applicant.A

Pitch has been used as a sealing compound and has the desirable quality of high resistance to permeation oi' moisture, but is not a suiilciently good adhesive under all the temperature and pressure conditions encountered. Other substances, which are better adhesives', are un. fortunately hygroscopic and permit moisture to permeate to the space between the panes.

The object of the invention is a structure in which the panes are sealed in a frame of metal or the like yby multiple means providing in combination the desirable qualities enumerated above.

The above and other objects of the invention will be apparent as the description proceeds.

According to the invention, the spacer between the panes is of resilient material, such as rubber, which is held under compression therebetween by the frame of the multiple window pane. The spacer is inset from the edges of the panes to provide a space for a vapor dam of pitch which is preferably senil-plastic or even semi-liquid throughout the temperature range likely to be encountered and is confined between the spacer,

A. the panes and the frame, which frame is secured over the edges of the panes by a strong adhesive. With this construction there can be no infiltration of water vapor to the space between the panes even-though the adhesive is hygroscopic. The drawing shows three diiferent modifications of a structure according to the invention. -In the drawing:

Figure 1 is a perspective view of a completed double window pane structure. V Figure 2 is an enlarged sectional view on line 2--2,of Figure 1,

(Cl. 2li-56.5)

Figure 3 is an enlarged sectional view showing a modiiication.

Figure 4 is an enlarged sectional view showing another modification.

Referring now to Figures 1 and 2, the panes i and 2 of glass or other transparent materiallare held in separated relationship by a spacer, in a frame of suitable strip material rolled to the section shown in Figure 2.

'Ihe spacer consists of two hollow resilient tubes 4 and l of rubber or the like, bonded to opposite sides of metal strip material 1. The metal strip 1 gives the spacer some rigidity so that it-may be readily laid straight and parallel to the edges of the panes from which it is inset. l The spacer is secured in position in compression between the panes, and between the spacer and the edges of the panes there is provided a space for a vapor dam III of plastic material such as pitch which is impermeable by water vapor.

A proper amount of pitch having been inserted in this space, the frame in the form oi' strip material notched at intervals as shown in broken lines in Figure 1, so that it may be bent to form side members il and Il and end members I 5 and ii with mltered ends and with a layer il of good adhesive over its inner surface, is pressed over lthe edges of the held under compression by the side walls of the frame.

The'butt joint 20 between the ends of the strip forming the frame is preferably arranged to be at about the middle of one of the sides as shown in Figure 1.

It will be noted that by resilient spacer provides a resilience, the pitch provides an effective vapo'r dam between the space between the panes and the outside atmosphere and is confined to the space provided for it by the stronger adhesive, while it is at the same time protected by the stronger adhesive from contact with any undesirable solvents' thereof such as the oil in glazing putty.

The embodiment shown in Figure 3-is similar to that shown in Figures 1 and2- except that the 4 rubber 2,0' of the spacer is solid instead of tubular.

In Figure 4 the metal frame 24 has a resilient cross section provided by the corrugations 2|. while the use of a hollow resilient spacer 26 of square cross section and without metal reinforcement is shown. 'I'he resilient frame permits of a greater degree of diiferential expansion between the panes and can be used when the differential this construction the ss pressure and temperature conditions are such as panes with the resilient spacer seal with the requisite to require a greater resilience in the trame. The sive between said panes and said frame, to bond corrugations which provide the requisite transthe parts together.

verse iiexibility at the same `time provide a lor- 2. The combination according to claim 1, in gitudinal stiffness which is desirable in the frames which the resilient spacer is held under compresof larger window panes. A suitable material for 5 sion between the panes, by the trame.

the frame is a thin soft metal such as copper,l but 3. The combination according to claim 1 in it will appreciatedthatoihermaterials (e. g.. which the spacer consistsA or Yresilient material i various linds of plastic material orrubberi might v'bonded to ia metal strip.` f

mused 'fi4.-"rh combination' according" fdciaim 1 in I claim: i l 1Q which the spacer is formed of tubular resilient 1. A multiple window pane structure having "a material. frame of strip material for its edges,- a resilient The combination according to claim 1 in spacer between the panes and spaced vfrom the y which the Vtrarne consists of a single strip of suitframe, a water vapor dam of fplastic'-gm'atei-iaijA able' matrialbeni around the perimeter of the impervious to moisture in' the' space thus' pro'` llijparies, and with a bitt Joint between its ends at vided between said spacer, said panes andsaid 'about the'mid'dle of one side. ftrame. and a less imperviousbut stronger adhe I fff CARL F. HUDDLE. 

